Removal of dissolved oxygen from water using a Pd-resin based catalytic reactor

doi:10.1007/s11705-009-0154-0

Front Chem Eng Chin

2009, Vol. 3

Issue (1) : 107-111 https://doi.org/10.1007/s11705-009-0154-0

RESEARCH ARTICLE

Removal of dissolved oxygen from water using a Pd-resin based catalytic reactor

Wenxin SHI¹(

), Chongwei CUI¹, Liye ZHAO², Shuili YU¹, Xia YUN¹

1. State Key Laboratory of Urban Water Resources and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China; 2. Heilongjiang Urban Planning and Surveying Design and Research Institute, Harbin 150040, China

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Abstract

The removal of dissolved oxygen (DO) from water was studied experimentally in a Pd-resin base catalyst reactor using purified hydrogen gas as a reducing agent. The effects of various operating conditions, such as hydrogen and water flow rates, height of the catalytic resin bed, temperature, pH value and run time, on the removal of DO, had been studied extensively. The results shows that DO could be removed by the reactor from ppm to ppb levels at ambient temperature. Increases of temperature, H₂ gas rate and the height of the catalytic resin were helpful to improve the DO removal rate. The change of pH value from 4 to 12 resulted in no effect on DO removal. Reaction time was the key factor to control the DO removal efficiency. Only when the reaction time was longer than 2.3 minutes under the experimental conditions, could a very low DO level be achieved.

Keywords dissolved oxygen palladium catalytic reactor hydrogen resin

Corresponding Author(s): SHI Wenxin,Email:swx@hit.edu.cn

Issue Date: 05 March 2009

Cite this article:

Wenxin SHI,Chongwei CUI,Liye ZHAO, et al. Removal of dissolved oxygen from water using a Pd-resin based catalytic reactor[J]. Front Chem Eng Chin, 2009, 3(1): 107-111.

URL:

https://academic.hep.com.cn/fcse/EN/10.1007/s11705-009-0154-0
https://academic.hep.com.cn/fcse/EN/Y2009/V3/I1/107

Fig.1 Experiment setup used in this study

Tab.1 Specification of the catalyst and the reactor

Fig.2 Effect of H gas flow rate and H pressure on DO removal
(HO flow rate= 100 mL/min, temperature: 14°C, pH of water 7.2, H flow rate varied from 6 to 10 mL/min)

Fig.3 Effect of feed water flow rate on DO removal
Temperature: 14°C, pH of water 7.2, H flow rate= 6, 8, 10 and 12 mL/min, HO flow rate varied from 4l/h to 14 L/h

Fig.4 Effect of height of catalytic resin bed on DO removal
Temperature: 22°C, pH of water 7.2, H flow rate= 10 mL/min

Fig.5 Effect of water temperature on DO removal
H flow rate= 10 mL/min, HO flow rate= 100 mL/min, pH of water: 7.2, temperature varied from 6°C to 32°C

Fig.6 Effect of run time on DO removal
H flow rate= 10 mL/min, HO flow rate= 6 L/h, pH of water: 7.2, temperature 14°C

Fig.7 Effect of pH value on DO removal
H flow rate=10 mL/min, HO flow rate= 100 mL/min, temperature: 14°C, pH of water varied from 4 to 11.5

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